The Allegro ACS726 current sensor IC family provides economical and precise solutions for AC current sensing in industrial, commercial, and communications systems. The device package allows for easy implementation by the customer. Typical applications include motor control, load detection and management, switched-mode power supplies, and overcurrent fault protection.
The fully differential output gives superior immunity to output offset drift as well common mode noise.
ACS726 is the first current sensor IC to include a fully differential back-end amplifier (BEA) that can be used to adjust gain and bandwidth via external RC networks. The BEA is fully independent and when unused, it can be powered down to reduce power consumption.
The device consists of a precise, low-offset, linear Hall sensor circuit with a copper conduction path located near the surface of the die. Applied current flowing through this copper conduction path generates a magnetic field which is sensed by the integrated Hall IC and converted into a proportional voltage. Device accuracy is optimized through the close proximity of the magnetic field to the Hall transducer. A precise, proportional voltage is provided by the low-offset, chopper-stabilized BiCMOS Hall IC, which is programmed for accuracy after packaging. The output of the device has a positive differential voltage (Voutp.- V.out当增加电流流过初级铜传导路径（从引脚1到6，引脚7到12），这是用于电流检测的路径。该导电路径的内部电阻典型为1.1MΩ，提供低功率损耗。
导电路径的端子与传感器IC信号引线（销13至24）电隔离。这允许ACS726电流传感器IC用于高侧电流检测应用，而无需使用高侧差分放大器或其他昂贵的隔离技术。亚博尊贵会员
The ACS726 is provided in a small, low-profile surface mount QSOP24 package (suffix LF). The leadframe is plated with 100% matte tin, which is compatible with standard lead (Pb) free printed circuit board assembly processes. Internally, the device is Pb-free, except for flip-chip high-temperature Pb-based solder balls, currently exempt from RoHS. The device, excluding the BEA, is fully calibrated prior to shipment from the factory.
